We understand that certain usernames are part of an online identity for some of us. If your desired username is already taken, we will be happy to help you acquire it for your account or channel, provided that you have that same username on at least two of these services: Facebook, Twitter, Instagram. Due to the fact that one account can register multiple bot and channel usernames, we reserve the right to recall usernames assigned to unused bots and channels, as well as openly squatted usernames.
If a scammer is pretending to be you, please contact NoToScam. Telegram is more secure than mass market messengers like WhatsApp and Line. We are based on the MTProto protocol see description and advanced FAQ , built upon time-tested algorithms to make security compatible with high-speed delivery and reliability on weak connections.
We are continuously working with the community to improve the security of our protocol and clients. We've got you covered.
On top of this, secret chats are not part of the Telegram cloud and can only be accessed on their devices of origin. We support two layers of secure encryption.
Server-client encryption is used in Cloud Chats private and group chats , Secret Chats use an additional layer of client-client encryption. All data, regardless of type, is encrypted in the same way — be it text, media or files.
You can find more info in the Advanced FAQ. See also: Do you process data requests? Telegram is open, anyone can check our source code , protocol and API , see how everything works and make an informed decision.
Telegram supports verifiable builds , which allow experts to independently verify that our code published on GitHub is the exact same code that is used to build the apps you download from App Store or Google Play. We welcome security experts to audit our system and appreciate any feedback at security telegram. On top of that, Telegram's primary focus is not to bring a profit , so commercial interests will never interfere with our mission. When it comes to secret chats , you don't — just make sure that the visualized key of your secret chat matches the one in your friend's secret chat settings.
More about this below. You can check out the Cracking Contest Description to learn more. Any comments on Telegram's security are welcome at security telegram. Please note that we can not offer bounties for issues that are disclosed to the public before they are fixed. Telegram can help when it comes to data transfer and secure communication.
This means that all data including media and files that you send and receive via Telegram cannot be deciphered when intercepted by your internet service provider, owners of Wi-Fi routers you connect to, or other third parties.
But please remember that we cannot protect you from your own mother if she takes your unlocked phone without a passcode. Or from your IT-department if they access your computer at work. Or from any other people that get physical or root access to your phones or computers running Telegram.
If you have reasons to worry about your personal security, we strongly recommend using only Secret Chats in official or at least verifiable open-source apps for sensitive information, preferably with a self-destruct timer. Logging in with an SMS code is an industry standard in messaging, but if you're looking for more security or have reasons to doubt your mobile carrier or government, we recommend protecting your cloud chats with an additional password.
Once enabled, you will need both an SMS code and a password to log in. You can also set up a recovery email address that will help regain access, should you forget your password. If you do so, please remember that it's important that the recovery email account is also protected with a strong password and 2-Step Verification when possible.
Check this out for tips on creating a strong password that is easy to remember. Using a rooted or jailbroken device makes it easier for a potential attacker to gain full administrative control over your device — root access. A user with root access can easily bypass security features built into the operating system, read process memory or access restricted areas, such as the internal storage.
Once an attacker has root access, any efforts to mitigate threats become futile. No application can be called safe under these circumstances, no matter how strong the encryption. Secret chats are meant for people who want more secrecy than the average fella. All messages in secret chats use end-to-end encryption. This means only you and the recipient can read those messages — nobody else can decipher them, including us here at Telegram more on this here.
On top of this, Messages cannot be forwarded from secret chats. And when you delete messages on your side of the conversation, the app on the other side of the secret chat will be ordered to delete them as well. You can order your messages, photos, videos and files to self-destruct in a set amount of time after they have been read or opened by the recipient. The message will then disappear from both your and your friend's devices. All secret chats in Telegram are device-specific and are not part of the Telegram cloud.
This means you can only access messages in a secret chat from their device of origin. They are safe for as long as your device is safe in your pocket. Remember that Telegram secret chats are device-specific. If you start a secret chat with a friend on one of your devices, this chat will only be available on that device.
If you log out, you will lose all your secret chats. You can create as many different secret chats with the same contact as you like. The Self-Destruct Timer is available for all messages in Secret Chats and for media in private cloud chats. To set the timer, simply tap the clock icon in the input field on iOS, top bar on Android , and then choose the desired time limit.
The clock starts ticking the moment the message is displayed on the recipient's screen gets two check marks. As soon as the time runs out, the message disappears from both devices. We will try to send a notification if a screenshot is taken.
Please note that the timer in Secret Chats only applies to messages that were sent after the timer was set. It has no effect on earlier messages. Unfortunately, there is no bulletproof way of detecting screenshots on certain systems most notably, some Android and Windows Phone devices. We will make every effort to alert you about screenshots taken in your Secret Chats, but it may still be possible to bypass such notifications and take screenshots silently.
We advise to share sensitive information only with people you trust. After all, nobody can stop a person from taking a picture of their screen with a different device or an old school camera. When a secret chat is created, the participating devices exchange encryption keys using the so-called Diffie-Hellman key exchange. After the secure end-to-end connection has been established, we generate a picture that visualizes the encryption key for your chat.
You can then compare this image with the one your friend has — if the two images are the same, you can be sure that the secret chat is secure, and no man-in-the-middle attack can succeed. Newer versions of Telegram apps will show a larger picture along with a textual representation of the key this is not the key itself, of course! Always compare visualizations using a channel that is known to be secure — it's safest if you do this in person, in an offline meeting with the conversation partner.
All Telegram messages are always securely encrypted. This enables your cloud messages to be both secure and immediately accessible from any of your devices — even if you lose your device altogether. The problem of restoring access to your chat history on a newly connected device e. At the same time, reliable backups are an essential feature for any mass-market messenger. To solve this problem, some applications like Whatsapp and Viber allow decryptable backups that put their users' privacy at risk — even if they do not enable backups themselves.
Other apps ignore the need for backups altogether and leave their users vulnerable to data loss. We opted for a third approach by offering two distinct types of chats. Telegram disables default system backups and provides all users with an integrated security-focused backup solution in the form of Cloud Chats.
Meanwhile, the separate entity of Secret Chats gives you full control over the data you do not want to be stored. This allows Telegram to be widely adopted in broad circles, not just by activists and dissidents, so that the simple fact of using Telegram does not mark users as targets for heightened surveillance in certain countries.
We are convinced that the separation of conversations into Cloud and Secret chats represents the most secure solution currently possible for a massively popular messaging application. On Telegram, you can send messages in private chats and groups without making your phone number visible.
By default, your number is only visible to people who you've added to your address book as contacts. Note that people will always see your number if they know it already and saved it in their address book. Each phone number is a separate account on Telegram. You have several options if you are using multiple phone numbers:. If you log out, you will keep all your cloud messages.
However, you will lose all your Secret Chats and all messages inside those secret chats when you log out. Note that logging out does not trigger remote deletion of your secret chat messages on your partner's device — to do that, choose 'Clear History' first.
You can change your number in Telegram and keep everything , including all your contacts, messages, and media from the Telegram cloud, as well as all your Secret Chats on all devices. To change your number, go to Settings, then tap on your phone number just above the username , then 'Change Number'. If you already have a different Telegram account on the target number, you'll need to delete that account first.
If you would like to delete your account, you can do this on the deactivation page. Deleting your account permanently removes all your messages and contacts. All groups and channels that you've created are orphaned and left without a creator but admins retain their rights.
We recommend using a non-mobile browser for this process. Note that you'll receive the code via Telegram , not SMS. As was just mentioned above, all your data will be flushed from our system: all messages, groups, and contacts associated with your account will be deleted. That said, your contacts will still be able to chat in the groups that you have created, and they will still have their copy of the messages you sent them.
So if you want to send messages that can vanish without a trace, try using our self-destruct timer instead. Termination of a Telegram account is irreversible. If you sign up again, you will appear as a new user and will not get your history, contacts or groups back. People, who have your phone number in their contacts, will be notified. The new user will be displayed as a separate conversation in their messages list and their conversation history with this new user will be empty.
Telegram is not a commercial organization, and we value our disk space greatly. If you stop using Telegram and don't come online for at least six months, your account will be deleted along with all messages, media, contacts and every other piece of data you store in the Telegram cloud. You can change the exact period after which your inactive account will self-destruct in Settings. First of all, sorry about your phone.
Unfortunately, the phone number is the only way for us to identify a Telegram user at the moment. We don't collect additional information about you, so whoever has the number, has the account. This means we can't help you unless you have access either to the phone number or to Telegram itself on any of your devices. Common thieves usually throw out the SIM card immediately the phone is harder to locate this way , then wipe the devices and sell them, so there isn't much risk for the data in case of regular petty theft.
But if you have reasons to worry about the data on the device and are unable to log out the other device , it is best that you wipe it remotely. You can read more about it here: Apple iOS , Android. Unfortunately, this requires you to have prepared in advance for this scenario. You can delete your Telegram account if you are logged in on at least one of your other devices mobile or desktop. Note that inactive Telegram accounts self-destruct automatically after a period of time — 6 months being the default setting.
If you're a developer, you may find our Bots FAQ more useful. Bots are like small programs that run right inside Telegram.
Creating Telegram bots is super-easy, but you will need at least some skills in computer programming. If you're sure you're up to it, our Introduction for Developers is a good place to start. Unfortunately, there are no out-of-the-box ways to create a working bot if you are not a developer. But we're sure you'll soon find plenty of bots created by other people to play with.
If you don't want a bot to send you messages, feel free to block it — same as you would block a human user. Some Telegram clients have a 'Stop Bot' button right in the bot's profile. Bots are no different from human users that you meet in groups for example. They can see your public name, username, and profile pictures, and they can see messages you send to them, that's it. They can't access your last seen status and don't see your phone number unless you decide to give it to them yourself. Naturally, any bot should be treated as a stranger — don't give them your passwords, Telegram codes or bank account numbers, even if they ask nicely.
Also, be careful when opening files sent by bots, same as you would deal with ordinary humans. Example: If a bot sent us a file called OpenMe. Bots can work in two modes when you add them to groups. By default, bots only see messages that are meant for them. In this case, you'll see 'has no access to messages' in the group members list next to the bot. Some bots need more information to work, so developers may disable the privacy mode. In this case, the bot will see all messages sent to the group, and you will see 'has access to messages' in the members list next to the bot.
Learn more about privacy mode for bots ». While we have some official bots for specific purposes like gif or GDPRbot , we don't usually make bots. There is no official store at the moment, so you'll have to ask your friends or search the web for now. We're pretty sure you'll find some bots to play with. All Telegram client apps are fully open source. We offer verifiable builds both for iOS and Android — this technology allows to independently verify that the application you download from the app stores was built using the exact same code that we publish.
In a post on his channel , Pavel Durov explained why Telegram hasn't published the server code, even as a publicity stunt. The encryption and API used on Telegram's servers are fully documented and open for review by security experts.
We welcome any comments at security telegram. Our architecture does not support federation yet. Telegram is a unified cloud service, so creating forks where two users might end up on two different Telegram clouds is unacceptable. Signal pushed back hard at the time. This is a BETA experience. You may opt-out by clicking here. More From Forbes. Nov 22, , am EST. Nov 21, , am EST. Nov 20, , am EST.
Nov 19, , pm EST. Edit Story. Apr 22, , am EDT. I cover security and surveillance and co-host 'Straight Talking Cyber'. Follow me on Twitter or LinkedIn. A new pop-up window will appear, and just tap Delete to confirm. Another way for you to get rid of the unwanted media from a chat is to delete chat history. Group admins have the option of deleting all the messages for all the members of the group. This option will be presented to you in different ways, depending on your device: Delete for Everyone on iOS devices or Delete for all members on Android phones.
If you only want to delete the messages for yourself, you can choose Delete for me on iOS and Delete on Androids. What kind of files do you share with others via Telegram? Have you ever needed to delete media from a conversation for privacy reasons? Share your experience in the comments section below!
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